* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: Arial, sans-serif; text-align: center; padding: 20px; }
header { margin-bottom: 30px; }
h1 { color: #333; margin-bottom: 10px; }
img { max-width: 100%; height: auto; margin: 20px 0; border-radius: 8px; }
button { background: #007bff; color: white; border: none; padding: 12px 24px; border-radius: 5px; cursor: pointer; font-size: 16px; }
footer { margin-top: 30px; color: #666; }